Patch Detail
get:
Show a patch.
patch:
Update a patch.
put:
Update a patch.
GET /api/patches/2215399/?format=api
{ "id": 2215399, "url": "http://patchwork.ozlabs.org/api/patches/2215399/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-i2c/patch/20260324-i2c-mux-v9-4-5292b0608243@gmail.com/", "project": { "id": 35, "url": "http://patchwork.ozlabs.org/api/projects/35/?format=api", "name": "Linux I2C development", "link_name": "linux-i2c", "list_id": "linux-i2c.vger.kernel.org", "list_email": "linux-i2c@vger.kernel.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260324-i2c-mux-v9-4-5292b0608243@gmail.com>", "list_archive_url": null, "date": "2026-03-24T13:54:18", "name": "[v9,4/5] i2c: davinci: add support for setting bus frequency", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "688826997c82c94298ecf2f8a1cfcd36e9fe81ca", "submitter": { "id": 46679, "url": "http://patchwork.ozlabs.org/api/people/46679/?format=api", "name": "Marcus Folkesson", "email": "marcus.folkesson@gmail.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-i2c/patch/20260324-i2c-mux-v9-4-5292b0608243@gmail.com/mbox/", "series": [ { "id": 497295, "url": "http://patchwork.ozlabs.org/api/series/497295/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-i2c/list/?series=497295", "date": "2026-03-24T13:54:14", "name": "I2C Mux per channel bus speed", "version": 9, "mbox": "http://patchwork.ozlabs.org/series/497295/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2215399/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2215399/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linux-i2c+bounces-16699-incoming=patchwork.ozlabs.org@vger.kernel.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linux-i2c@vger.kernel.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=ZHmvppdX;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c15:e001:75::12fc:5321; helo=sin.lore.kernel.org;\n envelope-from=linux-i2c+bounces-16699-incoming=patchwork.ozlabs.org@vger.kernel.org;\n receiver=patchwork.ozlabs.org)", "smtp.subspace.kernel.org;\n\tdkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com\n header.b=\"ZHmvppdX\"", "smtp.subspace.kernel.org;\n arc=none smtp.client-ip=209.85.208.170", "smtp.subspace.kernel.org;\n dmarc=pass (p=none dis=none) header.from=gmail.com", "smtp.subspace.kernel.org;\n spf=pass smtp.mailfrom=gmail.com" ], "Received": [ "from sin.lore.kernel.org (sin.lore.kernel.org\n [IPv6:2600:3c15:e001:75::12fc:5321])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fgBcx67kRz1xy1\n\tfor <incoming@patchwork.ozlabs.org>; Wed, 25 Mar 2026 01:05:05 +1100 (AEDT)", "from smtp.subspace.kernel.org (conduit.subspace.kernel.org\n [100.90.174.1])\n\tby sin.lore.kernel.org (Postfix) with ESMTP id 25DCA304A02A\n\tfor <incoming@patchwork.ozlabs.org>; Tue, 24 Mar 2026 13:55:16 +0000 (UTC)", "from localhost.localdomain (localhost.localdomain [127.0.0.1])\n\tby smtp.subspace.kernel.org (Postfix) with ESMTP id C639A3FE65F;\n\tTue, 24 Mar 2026 13:54:53 +0000 (UTC)", "from mail-lj1-f170.google.com (mail-lj1-f170.google.com\n [209.85.208.170])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits))\n\t(No client certificate requested)\n\tby smtp.subspace.kernel.org (Postfix) with ESMTPS id EA5E13FE37A\n\tfor <linux-i2c@vger.kernel.org>; Tue, 24 Mar 2026 13:54:50 +0000 (UTC)", "by mail-lj1-f170.google.com with SMTP id\n 38308e7fff4ca-38bcdda57b0so40507261fa.3\n for <linux-i2c@vger.kernel.org>; Tue, 24 Mar 2026 06:54:50 -0700 (PDT)", "from [192.168.1.135] (83-233-6-197.cust.bredband2.com.\n [83.233.6.197])\n by smtp.gmail.com with ESMTPSA id\n 2adb3069b0e04-5a285207454sm3162823e87.48.2026.03.24.06.54.46\n (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);\n Tue, 24 Mar 2026 06:54:47 -0700 (PDT)" ], "ARC-Seal": "i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116;\n\tt=1774360493; cv=none;\n b=anEXE5EeqB6lHthesjHyYByGydqt6zQCcnqFuN7NNH94sEX4NbC7IolcK9gQtwTkSMu+1+sJOvcUTtQi3AkfRZvM/1MjGGy8HPbhb5Hzpe0iOiIVxu6qKGcTMlqWO/9PE3kIQWJLf9/GVvv8+mDfYUgzQhRrKxhSkxh4kmFHJfg=", "ARC-Message-Signature": "i=1; a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1774360493; c=relaxed/simple;\n\tbh=ryrI9MAQVwCIRRCngn0KDdHz7g1aMSsslONZvQCRx8g=;\n\th=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References:\n\t In-Reply-To:To:Cc;\n b=MjXIASaOtR3N2+cSntN2R5gcp84WZLh4GpRxi5M9r1Xn+pZro/83hKA8Z+Oysb3Nbvd/ksoCAaRGifwH99sq1HVTr+mca57295CGZ+d32o99ytPqbDtl+15yCCpY23rZdD7/KKYfW549pybIn9SRG/oGZX6CVO1GNUIMuGj5IQ8=", "ARC-Authentication-Results": "i=1; smtp.subspace.kernel.org;\n dmarc=pass (p=none dis=none) header.from=gmail.com;\n spf=pass smtp.mailfrom=gmail.com;\n dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com\n header.b=ZHmvppdX; arc=none smtp.client-ip=209.85.208.170", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n d=gmail.com; s=20251104; t=1774360489; x=1774965289;\n darn=vger.kernel.org;\n h=cc:to:in-reply-to:references:message-id:content-transfer-encoding\n :mime-version:subject:date:from:from:to:cc:subject:date:message-id\n :reply-to;\n bh=oz1kP6mGnYmsV3pNCXtV9G7tgVBh7BnFUeruC1cPFLw=;\n b=ZHmvppdXhURiLELwFxX594JA+pei3PUXrlRBMh9PvnLy7Dc5iOVMY7qf+hMpV0RR/k\n aHaIDC/CQsi/rPTgj+s6Lq8Oa+qVwDCwbBydWJTote+frMgCr0VZkRjK5/h6lcLE7ZfI\n fJhiJIkoEDRrFp31e2gOpbLVQgZlLPlcPtzgTZfXf9WD1lKJxi1jn3rOV+NH9XSKeDLN\n XMvPTJelfdQuTM/xma7enmOxG+y/Fxf7Nm2jw3Uk7T9i0coHONuXYJEdCMxH5Ef4vtVU\n q4RddaidRJaYjmCqbpJhwTEwbxV+EANRyEhbwcyK4dujmf+VFu4uvdQEoWChQ3YTPAxy\n Nbrg==", "X-Google-DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n d=1e100.net; s=20251104; t=1774360489; x=1774965289;\n h=cc:to:in-reply-to:references:message-id:content-transfer-encoding\n :mime-version:subject:date:from:x-gm-gg:x-gm-message-state:from:to\n :cc:subject:date:message-id:reply-to;\n bh=oz1kP6mGnYmsV3pNCXtV9G7tgVBh7BnFUeruC1cPFLw=;\n b=otwtQ6hqFG7GYpvpX8yt7EF26SkmwVKXeBddYX5YkVsKXT57AqCz8YFL5jTRf5i6Kt\n QSaVqKhGr1kIRltS+PbgjYhVrYnOyXRb9LhK1O3KhPzjUOkhpv4dxS21mS5+sZwv+u7y\n OyR3FTDYPZRfl47/83y2AAnNRdg095ZLimhkE31lbcE2GVKbaL3QasqUDWs2Id1J2zAh\n tuWrbf6xENuBDO76Sv2RvKM5IntV1WRVxhqMxXbo5OqhrPXu11jtbOJw+tlygimRTpDk\n LPBSyehxedfR33kbvK9h3Dpi9p5/56TOIiVwXUdB46ZxnLhzVr7N/Wi7g3qDOmW4slv+\n ueAg==", "X-Gm-Message-State": "AOJu0YzVAT2A/Sys7pjOspGjLXxlmKxIajYO1gloSfT6R9XpXKDbLeZL\n\taTStn5guajCojF7txmEQETqn5mTicLut78p+Hac8XgXJEJvOb2xBtnOV", "X-Gm-Gg": "ATEYQzwoo9Ft2lajMqU/h6ZmFiEC6/dIda2Zad9kRUFpdLVGImIKjfGcu07+CmeNJwL\n\tTA6FotnWoMYrk2HNHH4oACzgH5bhyKBmtEfTCPT27N/gZ5qYYENDe1y8j32GHRq1w0IN3y5Wbwb\n\t45TPalokW/XZ5aAD3n1xJSddFkWB+XmsAhhf77YZqP932BBr2ydC4E8g6KYzN5z3g32NHkDZQd6\n\tUWHCsqrl203NxPgerQVNer0mBTr7XM9yzkTT0Luk6eLqM4BnsXcG36smZAwrb+xX/FExAnvAaHU\n\tpfnsT9V4eu6Yc5d6Nm15f+OnQGcEVg9hJg2C2P6JD0Vw71zLxOvrasvuyfQ57dWQ4mTrSId2e8K\n\ti5HCL1tGhNALJmvbmpKjt0heN3OuSl7gi2KLFg3DgFtDQt8IABg28Sra/cGwqD0IOMfp8+exQBc\n\tqibGd6/6HkMsfSNgJ7EQPqbVJONDwxTPImn9WieVfvvul4iGmToapAie+mvpJ/AhP2+YYb", "X-Received": "by 2002:a05:6512:124c:b0:5a1:6c86:b945 with SMTP id\n 2adb3069b0e04-5a285afdc41mr5770590e87.12.1774360488477;\n Tue, 24 Mar 2026 06:54:48 -0700 (PDT)", "From": "Marcus Folkesson <marcus.folkesson@gmail.com>", "Date": "Tue, 24 Mar 2026 14:54:18 +0100", "Subject": "[PATCH v9 4/5] i2c: davinci: add support for setting bus frequency", "Precedence": "bulk", "X-Mailing-List": "linux-i2c@vger.kernel.org", "List-Id": "<linux-i2c.vger.kernel.org>", "List-Subscribe": "<mailto:linux-i2c+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:linux-i2c+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=\"utf-8\"", "Content-Transfer-Encoding": "7bit", "Message-Id": "<20260324-i2c-mux-v9-4-5292b0608243@gmail.com>", "References": "<20260324-i2c-mux-v9-0-5292b0608243@gmail.com>", "In-Reply-To": "<20260324-i2c-mux-v9-0-5292b0608243@gmail.com>", "To": "Wolfram Sang <wsa+renesas@sang-engineering.com>,\n Peter Rosin <peda@axentia.se>,\n Michael Hennerich <michael.hennerich@analog.com>,\n Bartosz Golaszewski <brgl@bgdev.pl>, Andi Shyti <andi.shyti@kernel.org>,\n Andy Shevchenko <andriy.shevchenko@intel.com>,\n Bartosz Golaszewski <brgl@kernel.org>", "Cc": "linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org,\n linux-arm-kernel@lists.infradead.org,\n Marcus Folkesson <marcus.folkesson@gmail.com>,\n Bartosz Golaszewski <brgl@kernel.org>", "X-Mailer": "b4 0.14.3", "X-Developer-Signature": "v=1; a=openpgp-sha256; l=3881;\n i=marcus.folkesson@gmail.com; h=from:subject:message-id;\n bh=ryrI9MAQVwCIRRCngn0KDdHz7g1aMSsslONZvQCRx8g=;\n b=owEBbQKS/ZANAwAKAYiATm9ZXVIyAcsmYgBpwpecpKtb2LQM74bmvDz0req+77DcvmlflCxyE\n W4Thx+y7rWJAjMEAAEKAB0WIQQFUaLotmy1TWTBLGWIgE5vWV1SMgUCacKXnAAKCRCIgE5vWV1S\n MlCUD/wPBVoCUV1xDm82HsdePvpFTI2QRLF6oP9tMPcFfNn5gKnix7i6IZSK70o5JGbRZP2Oqt0\n krIWM96uzXsZY1ahQOTrC//PEKTVZLYgv8Lek7pJ8fNJV70Nd2DzkaovUlBXeGWQUeHcSX0rrc2\n jw8muH/LXYI4RgA3nxwZlX3lLNEb0nNbxv/rDf0jYPs+j9mcGXH0WnRwsoVv1JO/UovW6am8AkH\n tvgbfHNliDmVpPJPeE6U4SxgwY8Otxk3b7cw7L1y2bcqxDZFIzflpxzuNNkQj5DnW+llnIAzgP0\n sjO8H0ms1lOrTt5+f4i3I9gWz5CAdvaAmZwbG0n5JEwpG1CI5BnJVlFMwld+yEJBaU4HyAexUOY\n SnRNTR5ot1h1CREUoKB90y7hEflr+pzSwtaqZNYhU2WtZAYyqB7HRwV0TpoCOUGhndf0HXHMqyJ\n iljSssZsBtgHzvWyxdh885YIt54nIFeggj3YJs8prKmAiM305wftGDGIK2xLfY+IMdwQq/cJAPq\n +/5/7exap9aoXdqA8WVdd/gAnHS4L0bLoN7UzcALDmF4Am49BXowNySUrTaEqHHiQfTMe5uDwlE\n L7+KTQ7rWJCda0niD3xovRf+f7DUKsLQsSep5U2cweJQW4WJ0R5W443R0ez0yJwVRLlnoxAR3m7\n UorDwjz3rJvMstw==", "X-Developer-Key": "i=marcus.folkesson@gmail.com; a=openpgp;\n fpr=AB91D46C7E0F6E6FB2AB640EC0FE25D598F6C127" }, "content": "Populate adapter with clock_hz and .set_clk_freq() to enable support for\ndynamic bus frequency.\n\nRemove bus_freq_hz entirely and only use clock_hz instead.\n\nAcked-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>\nSigned-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>\n---\n drivers/i2c/busses/i2c-davinci.c | 35 ++++++++++++++++++++++++++++-------\n 1 file changed, 28 insertions(+), 7 deletions(-)", "diff": "diff --git a/drivers/i2c/busses/i2c-davinci.c b/drivers/i2c/busses/i2c-davinci.c\nindex 549fb22cdf4f..d87172408445 100644\n--- a/drivers/i2c/busses/i2c-davinci.c\n+++ b/drivers/i2c/busses/i2c-davinci.c\n@@ -132,8 +132,6 @@ struct davinci_i2c_dev {\n #ifdef CONFIG_CPU_FREQ\n \tstruct notifier_block\tfreq_transition;\n #endif\n-\t/* standard bus frequency */\n-\tunsigned int\t\tbus_freq_hz;\n \t/* Chip has a ICPFUNC register */\n \tbool\t\t\thas_pfunc;\n };\n@@ -171,6 +169,7 @@ static void i2c_davinci_calc_clk_dividers(struct davinci_i2c_dev *dev)\n \tu32 clkh;\n \tu32 clkl;\n \tu32 input_clock = clk_get_rate(dev->clk);\n+\tu32 bus_freq_hz = dev->adapter.clock_hz;\n \n \t/* NOTE: I2C Clock divider programming info\n \t * As per I2C specs the following formulas provide prescaler\n@@ -207,9 +206,9 @@ static void i2c_davinci_calc_clk_dividers(struct davinci_i2c_dev *dev)\n \tif (device_is_compatible(dev->dev, \"ti,keystone-i2c\"))\n \t\td = 6;\n \n-\tclk = (input_clock / (psc + 1)) / (dev->bus_freq_hz);\n+\tclk = (input_clock / (psc + 1)) / (bus_freq_hz);\n \t/* Avoid driving the bus too fast because of rounding errors above */\n-\tif (input_clock / (psc + 1) / clk > dev->bus_freq_hz)\n+\tif (input_clock / (psc + 1) / clk > bus_freq_hz)\n \t\tclk++;\n \t/*\n \t * According to I2C-BUS Spec 2.1, in FAST-MODE LOW period should be at\n@@ -267,7 +266,7 @@ static int i2c_davinci_init(struct davinci_i2c_dev *dev)\n \t\tdavinci_i2c_read_reg(dev, DAVINCI_I2C_CLKL_REG));\n \tdev_dbg(dev->dev, \"CLKH = %d\\n\",\n \t\tdavinci_i2c_read_reg(dev, DAVINCI_I2C_CLKH_REG));\n-\tdev_dbg(dev->dev, \"bus_freq_hz = %dHz\\n\", dev->bus_freq_hz);\n+\tdev_dbg(dev->dev, \"bus_freq_hz = %dHz\\n\", dev->adapter.clock_hz);\n \n \n \t/* Take the I2C module out of reset: */\n@@ -279,6 +278,27 @@ static int i2c_davinci_init(struct davinci_i2c_dev *dev)\n \treturn 0;\n }\n \n+static int davinci_i2c_set_clk(struct i2c_adapter *adap, u32 clock_hz)\n+{\n+\tstruct davinci_i2c_dev *dev = i2c_get_adapdata(adap);\n+\n+\tif (adap->clock_hz == clock_hz)\n+\t\treturn 0;\n+\n+\tadap->clock_hz = clock_hz;\n+\n+\t/* put I2C into reset */\n+\tdavinci_i2c_reset_ctrl(dev, 0);\n+\n+\t/* compute clock dividers */\n+\ti2c_davinci_calc_clk_dividers(dev);\n+\n+\t/* Take the I2C module out of reset: */\n+\tdavinci_i2c_reset_ctrl(dev, 1);\n+\n+\treturn 0;\n+}\n+\n /*\n * This routine does i2c bus recovery by using i2c_generic_scl_recovery\n * which is provided by I2C Bus recovery infrastructure.\n@@ -755,12 +775,13 @@ static int davinci_i2c_probe(struct platform_device *pdev)\n \tdev->dev = &pdev->dev;\n \tdev->irq = irq;\n \tplatform_set_drvdata(pdev, dev);\n+\tadap = &dev->adapter;\n \n \tr = device_property_read_u32(&pdev->dev, \"clock-frequency\", &prop);\n \tif (r)\n \t\tprop = I2C_MAX_STANDARD_MODE_FREQ;\n \n-\tdev->bus_freq_hz = prop;\n+\tadap->clock_hz = prop;\n \n \tdev->has_pfunc = device_property_present(&pdev->dev, \"ti,has-pfunc\");\n \n@@ -800,7 +821,6 @@ static int davinci_i2c_probe(struct platform_device *pdev)\n \t\tgoto err_unuse_clocks;\n \t}\n \n-\tadap = &dev->adapter;\n \ti2c_set_adapdata(adap, dev);\n \tadap->owner = THIS_MODULE;\n \tadap->class = I2C_CLASS_DEPRECATED;\n@@ -809,6 +829,7 @@ static int davinci_i2c_probe(struct platform_device *pdev)\n \tadap->dev.parent = &pdev->dev;\n \tadap->timeout = DAVINCI_I2C_TIMEOUT;\n \tadap->dev.of_node = dev_of_node(&pdev->dev);\n+\tadap->set_clk_freq = davinci_i2c_set_clk;\n \n \tif (dev->has_pfunc)\n \t\tadap->bus_recovery_info = &davinci_i2c_scl_recovery_info;\n", "prefixes": [ "v9", "4/5" ] }